Capabilities and Methods for Sediment, Rock, Material Coring and Analysis
Equipment and Software Geoprobe 420M dolly-mounted probe, Eijkelkamp soil coring kit, lake coring equipment, conductivity-total dissolved solids-temp meter and cables, full-range of small sampling tools and field description equipment (see pictures). Wet Laboratory includes: assorted ovens, balances, sieves, microscopes, crushers, Bartington MS3 magnetic susceptibility meter and several sensors, splitters, centrifuge, hot plates, freezer. Photography: Nikon D200, lenses, tripod and GoPro video. Software: Logplot, Bartsoft, Corewall.
Field Data Collection Geoscy is capable of direct push coring with Geoprobe, manual augering, or piston coring from floating platform to 15-40 ft sub-bottom depth. We contract for deeper coring and have worked with all drilling methods. We use well-established protocols for logging core and vertical facies analysis (Fig. 1 below). We are equipped to analyze any geologic exposures and collect water samples.
Laboratory Data Collection and Analysis
In the laboratory, we perform macro- and microscopic visual descriptions, particle-size analysis blending data from sieving and laser-diffraction (contracted), magnetic susceptibility measurement, analysis of water major, minor, and trace element chemistry, carbon contents, sample crushing and splitting for geochemical or mineralogical analysis (contracted), micropaleontological analyses, oxygen and carbon isotopic analyses on carbonates (we conduct in specialist laboratories).
We use a variety of software, including Logplot, Bartsoft, and Corewall, to graph and analyze data. An example of our work for a rotosonic core of glacial sediments from northern Indiana is shown in Fig. 1.
Fig. 1. Graphic lithologic log for an Indiana sediment core (SC0801) where width signifies mean grain size. Headings are: NGR= natural gamma radiation, MS= magnetic susceptibility, WZ= weathering zone, FA= facies assemblage, DE= depositional environment, SQ= sequence, and LS= lithostratigraphic unit. Dots on left indicate depth of sample analyses. Under DE, SB=subglacial, IM= ice-marginal, and SP= supraglacial. *
* Prentice, M.L., Ducey, P.W., Rupp, R.F., 2015, Rotosonic cores of the Lagro Formation in Huntington and Allen Counties, Indiana. Report of Progress 43, Indiana Geological Survey, Bloomington Indiana, 52 p.